my neighbor came to me and said his 2002 f250 diesel is acting weird. his power locks keychain remote went out so he started pulling fuses. they came back alive after jacking with the fuses for a while. after about 50 miles it did the same thing. he narrowed it down to a 10amp fuse for the 4x4 security system(trucks not 4x4)

when the keychain remote quits working he can pull that fuse, then put it back in and everything works for another 10-100 miles or so then it happens all over. anyone have any ideas?